1. Description of brake drum LK0579 Test Certification
ReportTest Report No. : PJ120201106Inspection Manufacturer :
Qingdao Pujie Industry Co. Ltd Export SeriesBrake
DrumTechnical RequirementSampling InspectionTest
ResultDisqualificationResultnAcReAStrength of extention
Rm,Mpa≥2201012340√Hardness,HBW180~240194Metallographic
StructureGraphite SgapeA Shape≥90%101√0√Grapgite Length3~5 Level5
LevelPearlite Quantity≥95%≥95%Varbide Quantity1~2 Level1
LevelPhosphide Eutectic1~2 Level1 LevelChemical Component
Analysis,%C3.3~3.71013.50√SI1.4~2.01.6Mn0.5~0.90.8P≤0.120.08S≤0.100.07BSurface
QualityCasting Compent1. Washed by shot blasting
machine
2. No residual oxide , no residual sand, has no butt, casting fin
or air buddle112√0√Brake DrumNo cold shut, no crack, no cinder pig,
no pore and so on√Surface of brake drumNo grease dirt√Form and
location toleranceSurface of friction cylinder radial full
indicator movement,MM≤0.200.18Surface Roughness Ra,μmSurface of
friction cylinder touch brake lining≤3.2
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